Still others, especially the percussion instruments, are struck by hammers that move when the air pressure changes.
The percussion rolls like thunder, the woodwinds climax, the camera swoops upward, and we see the brass plaque: The Olive Garden.
early 15c., "a striking, a blow; internal injury, contusion," from Latin percussionem (nominative percussio) "a beating, striking; a beat as a measure of time," noun of action from past participle stem of percutere "to strike hard, beat, smite; strike through and through," from per- "through" (see per) + quatere "to strike, shake" (see quash). Reference to musical instruments is first recorded 1776.
percussion per·cus·sion (pər-kŭsh'ən)
A method of medical diagnosis in which various areas of the body, especially the chest, back, and abdomen, are tapped with the finger or a plexor to determine by resonance the condition of internal organs.